Here's another excerpt from the ATF :
CHANGES IN FEDERAL LAW AS OF SEPTEMBER 13, 2004
RELATING TO
SEMIAUTOMATIC ASSAULT WEAPONS (SAWs)
AND
LARGE CAPACITY AMMUNITION FEEDING DEVICES (LCAFDs)
GENERAL
As of September 13, 2004, the provisions of Public Law 103-322, the Violent Crime Control and Law Enforcement Act of 1994, covering semiautomatic assault weapons and large capacity ammunition feeding devices are no longer in effect. The regulations implementing these provisions also are no longer in effect.
Specifically, there is no longer a Federal prohibition on the manufacture, transfer, and possession of semiautomatic assault weapons and large capacity ammunition feeding devices.
There are no longer any marking requirements for semiautomatic assault weapons and large capacity ammunition feeding devices. Existing markings on firearms and magazines relating to law enforcement or government use may be disregarded.